Subaru Legacy IV (2008 year). Manual — part 922

VDC(diag)-3

Basic Diagnostic Procedure

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

4

PERFORM DIAGNOSIS.
1) Refer to “List of Diagnostic Trouble Code
(DTC)”.

NOTE:
For the DTC list, refer to “List of Diagnostic
Trouble Code (DTC)”. <Ref. to VDC(diag)-34,
LIST, List of Diagnostic Trouble Code (DTC).>
2) Correct the cause of trouble.
3) Perform the Clear Memory Mode. <Ref. to
VDC(diag)-23, OPERATION, Clear Memory
Mode.>
4) Perform the Inspection Mode. <Ref. to
VDC(diag)-22, PROCEDURE, Inspection
Mode.>
5) Read the DTC. <Ref. to VDC(diag)-21,
OPERATION, Read Diagnostic Trouble Code
(DTC).>

Is DTC displayed?

Repeat step 4 until
DTC is not shown.

Finish the diagno-
sis.

Step

Check

Yes

No

VDC(diag)-4

Check List for Interview

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

2. Check List for Interview

A: CHECK

Check the following item about the vehicle’s state.

1. STATE OF ABS WARNING LIGHT

ABS warning light
illuminates.

Always
Sometimes
Only once
Does not come on

• When/How long does it illuminate?

Ignition key position

LOCK
ACC
ON (before starting engine)
START
ON (after starting engine, engine is running)
ON (after starting engine, engine is at a standstill)

Timing

Immediately after turning the ignition switch to ON
Immediately after turning the ignition switch to START

While accelerating

—

km/h

—

MPH

While driving at a constant speed

km/h

MPH

While decelerating

—

km/h

—

MPH

When turning to the right

Steering angle:

deg

Steering time:

Sec.

When turning to the left

Steering angle:

deg

Steering time:

Sec.

When other electrical parts are operating

• Part name:
• Operating condition:

VDC(diag)-5

Check List for Interview

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

2. STATE OF VDC WARNING LIGHT AND VDC OFF INDICATOR LIGHT

3. STATE OF VDC INDICATOR LIGHT

VDC warning light
and VDC OFF indi-
cator light illuminate.

Always
Sometimes
Only once
Does not come on

• When/How long does it illuminate?

Ignition key position

LOCK
ACC
ON (before starting engine)
START
ON (after starting engine, engine is running)
ON (after starting engine, engine is at a standstill)

Timing

Immediately after turning the ignition switch to ON
Immediately after turning the ignition switch to START

While accelerating

—

km/h

—

MPH

While driving at a constant speed

km/h

MPH

While decelerating

—

km/h

—

MPH

When turning to the right

Steering angle:

deg

Steering time:

Sec.

When turning to the left

Steering angle:

deg

Steering time:

Sec.

When other electrical parts are operating

• Part name:
• Operating condition:

VDC operation indi-
cator light illuminate.

Always
Sometimes
Only once
Does not come on

• When/How long does it illuminate?

Ignition key position

LOCK
ACC
ON (before starting engine)
START
ON (after starting engine, engine is running)
ON (after starting engine, engine is at a standstill)

Timing

Immediately after turning the ignition switch to ON
Immediately after turning the ignition switch to START

While accelerating

—

km/h

—

MPH

While driving at a constant speed

km/h

MPH

While decelerating

—

km/h

—

MPH

When turning to the right

Steering angle:

deg

Steering time:

Sec.

When turning to the left

Steering angle:

deg

Steering time:

Sec.

When other electrical parts are operating

• Part name:
• Operating condition:

VDC(diag)-6

Check List for Interview

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

4. CONDITIONS UNDER WHICH TROUBLE OCCURS

Environment

a) Weather

Fine
Cloudy
Rainy
Snowy
Others:

b) Ambient temperature

°C (°F)

c) Road

Inner city
Suburbs
Highway
Local street
Uphill
Downhill
Paved road
Gravel road
Muddy road
Sandy place
Straight road
Sharp curve
Gentle curve
S-curve
Road with a slope on both sides
Others:

d) Road surface

Dry
Wet
Covered with fresh snow
Covered with hardened snow
Frozen slope
Others: